MOSCOW (AP) — Russian parliament's lower house on Friday approved new legislation that toughens punishment for terrorism and requires terrorists' relatives to pay for the damages caused in attacks.

The document comes as Russia is preparing to host the Winter Olympics in Sochi in February amid concerns about security threats posed by an Islamic insurgency that has raged across the North Caucasus region.

The bill, quickly passed by the State Duma in a unanimous vote, is expected to see a similarly swift approval in the upper house and be signed by President Vladimir Putin to become law.

The document says that training for terrorist activities, something which isn't spelled out in the current law, is punishable by up to 10 years in prison. At the same time, it envisages that those involved in such training would be absolved of any punishment if they report it to the authorities.

For the first time, the new bill makes relatives of a terrorist responsible for paying damages resulting from an attack.

"We think that it's a very important form of preventive measures and action against terror, because the terrorist would know that it would not be just him held responsible, including financial responsibility, but his relatives too," said Nikolai Kovalyov, a lawmaker who was one-time chief of the main KGB successor agency, the Federal Security Service.

Tanya Lokshina, Russia program director at Human Rights Watch, criticized the new legislation, saying that making terrorists relatives liable for damages amounts to the introduction of collective responsibility.

"International law prohibits collective responsibility," Lokshina told The Associated Press. "There is also no collective responsibility in the Russian law."

The bill also made it easier for law enforcement agencies to prosecute suspected terrorists. The current law requires authorities to turn to Russia's high court to declare a group of militants a terrorist organization, while the new law leaves it for a local court where suspects are on trial to determine that.

It also introduces a punishment of up to six years for those participating in a militant group abroad.

The measure appears to be a response to Russian nationals fighting alongside rebels in Syria. Russian officials have voiced concern that they may launch attacks at home when they return.

Security experts have said the insurgency that has spread across the North Caucasus after two separatists wars in Chechnya, poses a potential threat to Putin's pet project, even though Russia has pledged to make the games "the safest Olympics in history."

Last summer, a top Chechen rebel warlord called on militants to disrupt the Sochi Games, which he described as "satanic dances on the bones of our ancestors."

Raising fears of a new wave of terror before the games, a female suicide bomber blew herself up on a city bus in southern Russia on Monday, killing six people and injuring about 30. The suspected bomber came from Dagestan, a Caspian Sea province, which has become the epicenter of the Islamic insurgency.